Process of preserving and coloring wood.



' CARL J. FALLER, F Z'U'RIGH, SWITZERLAND. I

- Because 01? PRESERVING-A'ND COLORING WOOD.

1,043,582, Specification of Letters Patent.

No Drawing.

To all whom it may concern:

citizen of Switzerland, residing at Zurich,

in the Canton of Ziirich, Switzerland, have invented certain new and useful Improvements in Processes of Preserving and Coloring WVood, of which the followingis aspeci-, fication. f

My invention consists in an improved proc-'- ess of impregnating wood, and has for itsgeneral object to provide a simple and efliz cient process of impregnation whereby the wood, either in a green or dry state, may be thoroughly and uniformlylpermeated with the liquid medium, and wherein the lime pregnating solution is of nature to serve we'll as a vehicle for dye or coloring. matter, to render the wood practically immune from the attack of insects and decay, and is non'-' poisonous.

Heretofore in impregnating. or dyeing wood, which was to be completely permeated, the wood has had to be taken when freshly felled, so as to contain all of the sap, and subjected to a bath of a thin or watery solution of the desired resistance or coloring matter, usually poisonous, maintained under high pressure so as to force the solution into and through the wood in imitation of the circulation of the sap.

By my improved process either dry or green wood may be impregnated so that every part of the wood body 'is' afl'ected by the solution, which may. or may not be colored. As a basic essential ingredient of. a solution for this purposeI employ a form of hyro-carbon, preferably a mineral oil; Specifically I have found a petroleum distillate, called ganzol which is a kerosene distillate having a boiling point of about to Celsius, and a specific weight of about 0.78, to be an advantageous and satisfactory agent, well adapted for the car rying of coloring matter, as it is ofpeculiar penetrating qualities, is highly preservative, and imparts to the wood treated therewith a hardness and smothness of texture which for many purposes greatly enhances the value of the wood; Where a coloringmatter is employed I prefer that it shall be an anilin coloring matter, added in suitable proportion to the ganzol or other hydrocarbon and thoroughly mixed therewith. For preservative impregnation other ingredients such as phenol may be added to enhance the Be it known that I, CARL J. FALLER, a'

PatentedNo-v. 5,1912.

Application filedTebruary -19, 1909. Serial No. 478,908.

preservative effect, but this is not essential.

To impregnate the wood it is placed in a tank filled with the solution of hydro-carbonimpregnating medium, such as ganzol, with or without dissolved coloring matter, so that the wood is entirely covered, and the stock is kept in the fluid until it is completely "permeated. For shortening to a degree the time of treatment, the receptacle or tankinwhich the process is carried out may be closed and maintained under pressure preferably of several atmospheres,and the solution may also be maintained in heated con;

dition preferably above boiling point with good results.

. As a practical example of the application of my improved process I have submerged pine railroad ties in .adyeing mixture of five hundred (500) liters of ganzol, having dissolved therein ten (10) kilograms of brown anilin color, inclosed in a suitableretort and boiled under a pressure of three atmospheres for about 24 hours, with eX- cellent results.

The solution may be used more than once, I

it being only necessary for its employment as a second bath to add say fifty (50) liters of ganzol to the charge, without any addi tional coloring matter. Under such condi 'tions the solution heated slightly is found thoroughly to dye the Wood in twenty four (24) hours. After treatment in the bath the wood is taken out and left to drain until suitably dry.; It then may be worked or employed.

in any usual manner and will be found to be uniform in color throughout its cross section. Having described my invention, what I claim is" v l. The process of dyeing wood in a green or dry condition which consists in immerging the wood in a bath composed of a petroleum distillate and an anilin coloring matter, subjecting said bath and the immerged wood to a pressure above atmospheric pressure, and boiling said fluid While under said pressure.

2. The process of coloring wood which consists-in submerging the wood in a green or dry state in a solution consisting Wholly of petroleum distillate and suitable coloring.

petroleum distillate.

3; The process of eoloring wood which In testimony whereof I hereunto set my consists in submerging wood, in a green or hand in the presence of two witnesses. drystate, in a solution consisting wholly of i petroleum distillate and a coloringmatter I CARL FALLER' 5 soluble in petroleum distillate, until the In presence of wood is permeated through and through by MAX HIRED,

the color-carrying petroleum distillate. JOSEPH SIMMS. 

